Posts tagged “extension tube”

Macro and Close-up photography is a lot of fun and it can open a whole new world of opportunities for a photographer. You don’t necessarily need to buy a dedicated Macro lens, there is other options, we will look at that later.

Macro lenses

A true Macro lens can go to a reproduction ratio of 1:1 but some lenses (often older manual lenses) can be found that only goes to a 1:2 repro ratio and needs an extension tube to go to 1:1. Many zoom lenses have a Macro position but at best they will go down to a 1:3 ratio. Some wide angle lenses have a Macro position, i have an old Clubman 24mm/2.8 Macro that can go down to 1:4 repro ratio. Currently on the market you can find many Macro lenses in different focal lengths ranging from 35mm up to 200mm, some are stabilized and some rely on the image stabilisation in the cameras (IBIS). If you really want to get close with excellent IQ Canon makes the MP-E 65mm 1-5X which can go from 1:1 to 5:1 repro ratio. Macro lenses are the best way to go because they are easier to use in the field, you just turn the focusing ring as you get closer and the IQ is excellent, but they are not cheap unless you can buy old ones are some newer models on the used market.

From left to right: Pentax DA 35mm/2.8 Macro Limited, SMC Macro-Takumar 50mm/4 and Pentax DFA 100mm/2.8 Macro WR. As a side note you can see the big difference here between the lenses from the old manual focus Takumar to the modern Macro lenses when you look at the distance scale, the focus throw of AF lenses is so short that those scale are pretty much useless compared to the old time.

Here is my Clubman 24mm Macro, you can see the reproduction ratio on the front of the barrel.

A small Macro lens like the Pentax DA 35mm Macro is easy to carry around and can give effect that a longer Macro lens can’t. Here i was so close that the lens was touching the flower and the result is that we feel like we are in the flower with the insect.

A longer Macro lens gives you more working distance which can be useful for insects or potentially dangerous animals like this snapping turtle. Here i was using my 100mm Macro lens handheld but a 200mm lens would have been even better to be safer.

Here is a comparison between 2 Macro lenses to show how the focal length affect the background. The photo above was taken with the Pentax DA 35mm Macro Ltd.

Now, this one i tried to kept the same subject’s size with a Vivitar 90-180mm Flat Field at 180mm at the same f-stop. Also notice the different color cast of the 2 lenses.

Reversing ring

Reversing rings are a cheap way to get into Macro photography, you just screw the reversing ring into the filter thread of the lens and then mount it to the camera (BTW they came in different sizes, like filters). You need a lens with an aperture ring to do that if you want to control the aperture ring of the lens even if you don’t gain much DOF by doing so. The wider the lens the closer you can go and gain more magnification but you will be very close and the rear of the lens is exposed to the elements. You can’t vary magnification much by focusing the lens, so if you want a different magnification you need to use another lens. Another advantage is that you can mount whatever brand of lens you want.

A reversing ring is a cheap way to get into Macro photography, you can use it on your kit lens or a small prime like a 28mm, 35mm or 50mm.

Here i used it with my SMC Takumar 35mm/3.5 to photograph this lady bug.

Close-up lenses

Close-up lenses are like filters and when used on any lens they make it focus closer. They come in different strengths, size and quality. I have a Nikon close-up 6T, but Canon makes very good ones also, you will pay more for those 2 brands but the IQ is worth it. The advantage is that you don’t loose light when you use them but depending on the lens the IQ can suffer. You can still use them on a Macro lens for more magnification.

Extension tubes

Even if you have a Macro lens extension tubes are worth having in your camera bag, i use them with my Macro lens and also with my longer lenses to make them focus closer. There are many choices on the internet, you don’t need to pay for the ones from your camera brand since this is only tubes without any glass elements in them. They come in a set of tree but you can also buy them separately (Canon does that). I use Aputure extension tube set (13mm, 21mm and 31mm) for my Canon gear and they work very well with my lenses and AF works very well also even on my 400mm lens when needed.

Extension tubes uses the same mount as your camera brand (if you use Pentax you need to buy K mount tubes, Canon EF mount for Canon ….) and you mount them between the camera and the lens. So if you want to use your 50mm/1.8 lens with extension tubes you need to add 50mm of extension tubes to get to a reproduction ratio of 1:1. So here comes the biggest drawback of extension tubes,as you add extension tubes you loose more and more light and you quickly loose 1 or 2 stop of light which results in a longer exposure time. I like to use extension tubes with a zoom lens because the magnification varies as you zoom, so if you add about 50mm of extension tubes to a 70-200mm lens you will gain more magnification as you zoom from 200mm to 70mm.

Here is a photo taken with a 70-300mm lens with 64mm of extension tubes, not in the Macro range but we can call it Close-up.

Another photo taken with extension tubes added to a lens, this time it was to my Tele-Takumar 200mm/5.6.

Teleconverter

Yes they can be useful, i use my TC 1.4X with my 100mm Macro lens when i need more magnification but want to keep the same working distance and don’t want to disturb my subject. You can add a Teleconverter between your camera and the extension tubes to gain more magnification or to your lens alone. A good teleconverter is not cheap but the older Tamron 1.4X AF for my Pentax was working very well with my DFA 100mm Macro WR. The TC also cost you light, 1 stop for the 1.4X and 2 stops for a TC 2X.

Sometimes a TC 1.4X is needed even with a 100mm Macro lens.

Other options

There is also bellows that acts like a variable extension tube but they are not very practical to use in the field, too big and easy to damage. You can also reverse a 50mm on a 200mm lens but i’ve never tried it myself. I will post another article soon that will talk more on the use of the options above and techniques for using them.